California Code, Business and Professions Code - BPC § 6735.6

(a) If the registered civil engineer provided construction phase services on the project that include supervision of the construction of engineering structures, the plans shall be based upon the field observations of the registered civil engineer and his or her agents, and information received from the project owner, project contractors, and public agencies.

(b) If the registered civil engineer did not provide construction phase services on the project that include supervision of the construction of engineering structures, the plans shall be based on information received from the project owner, project contractors, and public agencies, but need not be based upon a field verification or investigation of the improvements or grades, unless the registered civil engineer is engaged to provide such field verification services.

(c) The registered civil engineer shall not be required to include a certificate or statement on as built, as constructed, or record plans that is inconsistent with or varies from the provisions of this section.